BRPI0318522B8 - method and system for estimating the transfer function of a transmission channel, and receiver for receiving digital signals through a transmission channel - Google Patents
method and system for estimating the transfer function of a transmission channel, and receiver for receiving digital signals through a transmission channel Download PDFInfo
- Publication number
- BRPI0318522B8 BRPI0318522B8 BRPI0318522A BRPI0318522A BRPI0318522B8 BR PI0318522 B8 BRPI0318522 B8 BR PI0318522B8 BR PI0318522 A BRPI0318522 A BR PI0318522A BR PI0318522 A BRPI0318522 A BR PI0318522A BR PI0318522 B8 BRPI0318522 B8 BR PI0318522B8
- Authority
- BR
- Brazil
- Prior art keywords
- channel estimates
- transmission channel
- channel
- estimating
- transfer function
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0204—Channel estimation of multiple channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
- H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
- H04L25/0232—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols by interpolation between sounding signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
- H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
- H04L25/0236—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols using estimation of the other symbols
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
método e sistema para estimar a função de transferência de um canal de transmissão, receptor para receber sinais digitais através de um canal de transmissão, e, produto de programa de computador carregável na memória de pelo menos um computador um sistema para estimar a função de transferência de um canal de transmissão tal como o canal de ligação inferior em um sistema de cdma através do qual um sinal piloto (p-cpich) e um sinal de dados (dpch) são transmitidos. o sistema inclui: pelo menos um estimador (21, 22, 27; 24, 23, 25) para produzir primeira e segunda estimativas de canal do sinal piloto e dos sinal de dados; e um nó de combinação (26) para combinar a primeira e segunda estimativas de canal para obter estimativas de canal combinadas finais. o sistema inclui um módulo de interpolador (25) adaptado para interpolar as segundas estimativas de canal através de um tempo de referência de estimação básico (t) para produzir números iguais de estimativas de canal através do tempo de referência de estimação básico (t) derivadas do sinal de dados e do sinal piloto, respectivamente, e, possivelmente, módulos de adaptação de taxa (23, 27) adaptados para mapear as estimativas de canal no tempo de referência de estimação básico (t). o nó de combinação é um nó de soma (26) produzindo as estimativas de canal combinadas finais como uma soma (26) das primeiras estimativas de canal e das segundas estimativas de canal interpoladas.method and system for estimating the transfer function of a transmission channel, receiver for receiving digital signals through a transmission channel, and, computer program product downloadable in the memory of at least one computer a system for estimating the transfer function of a transmission channel such as the lower link channel in a cdma system through which a pilot signal (p-cpich) and a data signal (dpch) are transmitted. the system includes: at least one estimator (21, 22, 27; 24, 23, 25) to produce first and second channel estimates of the pilot signal and data signals; and a combination node (26) to combine the first and second channel estimates to obtain final combined channel estimates. the system includes an interpolator module (25) adapted to interpolate the second channel estimates through a basic estimation reference time (t) to produce equal numbers of channel estimates through the derived basic estimation reference time (t) of the data signal and pilot signal, respectively, and possibly rate adaptation modules (23, 27) adapted to map the channel estimates in the basic estimation reference time (t). the combination node is a sum node (26) producing the final combined channel estimates as a sum (26) of the first channel estimates and the second interpolated channel estimates.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2003/010815 WO2005041509A1 (en) | 2003-09-30 | 2003-09-30 | Channel estimation using pilot symbols |
Publications (2)
Publication Number | Publication Date |
---|---|
BRPI0318522B1 BRPI0318522B1 (en) | 2019-12-03 |
BRPI0318522B8 true BRPI0318522B8 (en) | 2020-01-14 |
Family
ID=34485994
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BRPI0318522A BRPI0318522B8 (en) | 2003-09-30 | 2003-09-30 | method and system for estimating the transfer function of a transmission channel, and receiver for receiving digital signals through a transmission channel |
BRPI0318522-2A BR0318522A (en) | 2003-09-30 | 2003-09-30 | method and system for estimating the transfer function of a transmission channel, receiver for receiving digital signals over a transmission channel, and computer program product loadable in the memory of at least one computer |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BRPI0318522-2A BR0318522A (en) | 2003-09-30 | 2003-09-30 | method and system for estimating the transfer function of a transmission channel, receiver for receiving digital signals over a transmission channel, and computer program product loadable in the memory of at least one computer |
Country Status (6)
Country | Link |
---|---|
US (1) | US7606334B2 (en) |
EP (1) | EP1668853B1 (en) |
CN (1) | CN1839602B (en) |
AU (1) | AU2003276006A1 (en) |
BR (2) | BRPI0318522B8 (en) |
WO (1) | WO2005041509A1 (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10354468A1 (en) * | 2003-11-21 | 2005-06-23 | Rohde & Schwarz Gmbh & Co. Kg | Method and device for monitoring the carrier frequency stability of transmitters in a common wave network |
KR20070090800A (en) * | 2006-03-03 | 2007-09-06 | 삼성전자주식회사 | Apparatus and method for channel estimation in wireless communication system |
EP1903728A1 (en) * | 2006-09-20 | 2008-03-26 | Nokia Siemens Networks Gmbh & Co. Kg | Method and receiving apparatus for estimating a channel in a communications system |
GB0706781D0 (en) * | 2007-04-05 | 2007-05-16 | Vodafone Plc | Telecommunications networks and devices |
US7929652B2 (en) * | 2007-04-10 | 2011-04-19 | Qualcomm Incorporated | Adaptive pilot and data symbol estimation |
US20100027717A1 (en) * | 2007-07-31 | 2010-02-04 | Reddot Wireless, Inc. | Equalization of OFDM Signals Based on Time and Then Frequency Interpolation |
US8699529B2 (en) * | 2008-03-28 | 2014-04-15 | Qualcomm Incorporated | Broadband pilot channel estimation using a reduced order FFT and a hardware interpolator |
US20100067331A1 (en) * | 2008-09-12 | 2010-03-18 | Yang Tsih C | Iterative correlation-based equalizer for underwater acoustic communications over time-varying channels |
KR101556636B1 (en) * | 2008-12-16 | 2015-10-01 | 삼성전자주식회사 | Method and apparatus for estimating channel using data channel |
US8942305B2 (en) | 2009-04-30 | 2015-01-27 | Koninklijke Philips N.V. | Method for communicating in a network |
ES2729264T3 (en) | 2010-06-16 | 2019-10-31 | Ericsson Telefon Ab L M | Methods and arrangements for transmitting and decoding reference signals |
CN103120016B (en) * | 2010-06-16 | 2016-06-08 | 爱立信(中国)通信有限公司 | The low latency channel estimating of downlink mimo |
CN102404258B (en) | 2011-11-29 | 2014-07-09 | 华为技术有限公司 | Method, system and mobile terminal for estimating downstream channels |
US9350590B2 (en) * | 2013-10-25 | 2016-05-24 | Texas Instruments Incorporated | Method, system and apparatus for carrier frequency offset correction and channel estimation |
JP2015084657A (en) * | 2013-10-28 | 2015-05-07 | セイコーエプソン株式会社 | Device for nucleic acid extraction |
US10051616B2 (en) * | 2014-10-07 | 2018-08-14 | Massachusetts Institute Of Technology | Multiuser detection for high capacity cellular downlink |
WO2016115627A1 (en) * | 2015-01-20 | 2016-07-28 | ZTE Canada Inc. | Channel estimation using composite subcarriers and combined pilots |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6154443A (en) * | 1998-08-11 | 2000-11-28 | Industrial Technology Research Institute | FFT-based CDMA RAKE receiver system and method |
JP3237628B2 (en) * | 1998-11-02 | 2001-12-10 | 日本電気株式会社 | Channel characteristics estimator |
US6452917B1 (en) | 1999-04-08 | 2002-09-17 | Qualcomm Incorporated | Channel estimation in a CDMA wireless communication system |
US6414988B1 (en) | 1999-05-12 | 2002-07-02 | Qualcomm Incorporated | Amplitude and phase estimation method in a wireless communication system |
JP2001326586A (en) * | 2000-05-17 | 2001-11-22 | Nec Corp | Cdma communication system and channel estimate method used for it |
JP3735015B2 (en) * | 2000-07-26 | 2006-01-11 | 松下電器産業株式会社 | Line estimation apparatus and line estimation method |
CA2415170C (en) * | 2001-12-28 | 2008-07-15 | Ntt Docomo, Inc. | Receiver, transmitter, communication system, and method of communication |
-
2003
- 2003-09-30 EP EP03818892.6A patent/EP1668853B1/en not_active Expired - Lifetime
- 2003-09-30 WO PCT/EP2003/010815 patent/WO2005041509A1/en active Application Filing
- 2003-09-30 BR BRPI0318522A patent/BRPI0318522B8/en unknown
- 2003-09-30 CN CN038271451A patent/CN1839602B/en not_active Expired - Fee Related
- 2003-09-30 US US10/573,830 patent/US7606334B2/en not_active Expired - Fee Related
- 2003-09-30 AU AU2003276006A patent/AU2003276006A1/en not_active Abandoned
- 2003-09-30 BR BRPI0318522-2A patent/BR0318522A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP1668853A1 (en) | 2006-06-14 |
US7606334B2 (en) | 2009-10-20 |
US20070036243A1 (en) | 2007-02-15 |
CN1839602A (en) | 2006-09-27 |
CN1839602B (en) | 2012-01-18 |
BRPI0318522B1 (en) | 2019-12-03 |
AU2003276006A1 (en) | 2005-05-11 |
BR0318522A (en) | 2006-09-12 |
WO2005041509A1 (en) | 2005-05-06 |
EP1668853B1 (en) | 2017-07-05 |
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